Hard court for tennis and the like



Oct. 30, 1928. I 1,690,059

G. J. EILERS HARD COURT FOR TENNl S AND THE LIKE Filed Feb. 9, 1928 //V/ 4 r0/ Q mrd J 576/8 6( W, flm M W 417]. i

Patented Oct. so, 1928.

UNITED STATES GERARD JOHANNES EILERS, OF AMSTERDAM, NETHERLANDS.

HARD COURT FOR TEN'NIS AND THE LIKE.

Application filed February 9, 1928, Serial No. 253,188, and in the Netherlands January 6, 1927. i

cient drainage for liquid so that they do not dry rapidly enough in order that play may be recommenced quickly after rain. Secondly,

it often occurs that when endeavoring to form a porous top layer the uppermost layer is prepared with a material which is not sufficiently repellent to footprints so that the required I smooth surface is not retained. Finally, when trying to produce a solid and yet sufliciently draining top layer the disadvantage occurs that the surface is too coarse, resulting in a too ready wear and tear ofthe shoes and of the balls and affording a risk of hurting the players when they'fall.

The invention has for its object to remove these inconveniences and consists of a court, which is formed by a bottom layer 1 of granulated, blast-furnace-slags, coated with a layer 2 of finer and sifted slags of the same kind, as is shown in Figure 1 of the drawings in cross-section.

According to the invention the paving can also be prepared by a bottom layer 1 of said slags above which is a layer 3 consisting of a mixture of finer, sifted slags of the same kind and powdered bricks e. g. of red or green 001- our or a similar binding material, as is shown in Figure 2 of the drawings in cross-section.

It will be found that a hard court produced according to the invention will present to the players a resilient, smooth paving with a suifieiently solid and durable surface, affording an extraordinary good drainage for liquid. The materials used are porous and at the same time absorptive while they receive binding qualities after some time. 5

I am aware that it has already been suggested to use not-granulated slags and bricks for the purpose of constructing tennis courts and the like, brL the use of the particular material according to this invention, i: e. granula'ted slags, is a salient feature of my invention.

What I claim is A construction for a tennis court or the like comprising a bottom layer of coarse, granulated blast furnace slags having a rough surface and many projecting parts, and a top layer interlocking with said bottom layer and including a mixture of finer, sifted, granulated blast furnace slags of the same general character as the bottom layer and a binder of powdered brick dust.

In testimony whereof I ailix my signature, at the city of Amsterdam, this 26th day of January, 1928. v

GERARD J OHANN ES EILERS. 

